77404738 has 4 divisors (see below), whose sum is σ = 116107110. Its totient is φ = 38702368.

The previous prime is 77404711. The next prime is 77404759. The reversal of 77404738 is 83740477.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 74770609 + 2634129 = 8647^2 + 1623^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 77404738.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19351183 + ... + 19351186.

Almost surely, 2^77404738 is an apocalyptic number.

77404738 is a deficient number, since it is larger than the sum of its proper divisors (38702372).

77404738 is a wasteful number, since it uses less digits than its factorization.

77404738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38702371.

The product of its (nonzero) digits is 131712, while the sum is 40.

The square root of 77404738 is about 8797.9962491467. The cubic root of 77404738 is about 426.1761891785.

The spelling of 77404738 in words is "seventy-seven million, four hundred four thousand, seven hundred thirty-eight".